package com.berchen.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import java.time.Duration;

@Configuration
public class RedisConfig {

    // 自定义RedisTemplate 自定义对数据的解析格式，自定义RedisTemplate对基于注解的Redis缓存不起作用。
    // RedisAutoConfiguration中的方法签名
    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> template = new RedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);

        // 创建JSON格式序列化对象，对缓存数据的Key和Value进行转换。
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer=new Jackson2JsonRedisSerializer(Object.class);

        // 解决查询缓存转换异常的问题
        ObjectMapper om=new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);

        jackson2JsonRedisSerializer.setObjectMapper(om);

        // 设置RedisTemplate模板API的序列化方式为JSON
        template.setDefaultSerializer(jackson2JsonRedisSerializer);
        return template;
    }

    // 自定义RedisCacheManager
    @Bean
    public RedisCacheManager cacheManager(RedisConnectionFactory redisConnectionFactory){

        // 分别创建String和JSON格式序列化对象，对缓存数据key和value进行转换
        RedisSerializer<String> stringRedisSerializer=new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer=new Jackson2JsonRedisSerializer(Object.class);
        // 解决查询缓存转换异常的问题
        ObjectMapper om=new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);

        jackson2JsonRedisSerializer.setObjectMapper(om);

        // 定制缓存数据序列化方式及时效
        RedisCacheConfiguration configuration=RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofDays(1))
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(stringRedisSerializer))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                .disableCachingNullValues();
        RedisCacheManager cacheManager=RedisCacheManager.builder(redisConnectionFactory).cacheDefaults(configuration).build();
        return cacheManager;
    }
}
